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| Titel |
Review Article: "The Lagrangian description of aperiodic flows: a case study of the Kuroshio Current" |
| VerfasserIn |
C. Mendoza, A. M. Mancho |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 19, no. 4 ; Nr. 19, no. 4 (2012-08-21), S.449-472 |
| Datensatznummer |
250014233
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| Publikation (Nr.) |
 copernicus.org/npg-19-449-2012.pdf |
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| Zusammenfassung |
| This article reviews several recently developed Lagrangian tools and shows how their combined use
succeeds in obtaining a detailed description of purely advective transport events in general aperiodic flows.
In particular, because of the climate impact of ocean transport processes, we illustrate a 2-D application on
altimeter data sets over the area of the Kuroshio Current, although the proposed techniques are general
and applicable to arbitrary time dependent aperiodic flows.
The first challenge for describing transport in aperiodical time dependent flows is
obtaining a representation
of the phase portrait where the most relevant dynamical features may be identified.
areas that are related to confinement regions.
This representation is accomplished by using global Lagrangian descriptors that when applied
for instance to the altimeter data sets retrieve over the ocean surface a
phase portrait where the geometry of interconnected dynamical systems is visible.
The phase portrait picture is essential because it evinces
which transport routes are acting on the whole flow. Once
these routes are roughly recognised, it is possible to
complete a detailed description by the direct computation
of the finite time stable and unstable manifolds of
special hyperbolic trajectories that act as organising centres of the flow. |
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